120728549 has 2 divisors, whose sum is σ = 120728550. Its totient is φ = 120728548.

The previous prime is 120728533. The next prime is 120728579. The reversal of 120728549 is 945827021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82992100 + 37736449 = 9110^2 + 6143^2 .

It is a cyclic number.

It is not a de Polignac number, because 120728549 - 2⁴ = 120728533 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120728579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60364274 + 60364275.

It is an arithmetic number, because the mean of its divisors is an integer number (60364275).

Almost surely, 2^120728549 is an apocalyptic number.

It is an amenable number.

120728549 is a deficient number, since it is larger than the sum of its proper divisors (1).

120728549 is an equidigital number, since it uses as much as digits as its factorization.

120728549 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 120728549 is about 10987.6543902691. The cubic root of 120728549 is about 494.2385995189.

The spelling of 120728549 in words is "one hundred twenty million, seven hundred twenty-eight thousand, five hundred forty-nine".